<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="./less/sty1.css" >
    <style>

    </style>
</head>
<body>
    <div id="div1">
        <div class="clas1"></div>
    </div>
    <div id="div2">
        <div class="clas2"></div>
    </div>
    <div id="div3">
        <div class="clas3"></div>
    </div>
    <div id="div4">
        
    </div>
</body>
</html>